સુતરના તાંતણે નથી કે તોડી નાંખીએ.

sutaranā tāṁtaṇē nathī kē tōḍī nāṁkhīē.

Literally: It is not a cotton thread that we can just snap it.
What it means: Deep relationships or serious commitments cannot be easily broken off like a fragile string.

Also said as

ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1923) ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1921) · read from the scan by machine — the Gujarati itself is unchecked · English is machine-made and nobody has checked it yet

Heard it differently, or know we've got the sense wrong? Tell us — that is exactly the kind of correction this needs.